Field Service Engineer

Job Purpose

The Field Service Engineer will supervise the onsite installation of the KARNO™ Power Module at customer sites, and lead the commissioning, maintenance, troubleshooting, and on-site customer support for the successful deployment of the KARNO Power Modules. This position is part of Hyliion's field service organization, which supports KARNO installations across the United States. Current deployments are primarily in defense and data center applications. The position begins with a training period of approximately three to four months in Milford, OH, working alongside the research, development, and engineering teams as KARNO units are built and serviced during final testing, including training on heat engine fundamentals, PLCs, HMIs, and advanced control systems. The position then transitions to field installation, commissioning, and long-term on-site support at customer locations, initially across the West Coast and expanding to other regions as the installed base grows.

AI at Hyliion

At Hyliion, AI is core to how we work. We equip every team member with leading AI tools and count on you to use them — to move faster, solve harder problems, and help us realize the full potential of KARNO technology for the world.

Duties and Responsibilities

• Provide on-site maintenance, troubleshooting, and break-fix support for deployed KARNO units, with remote support from the engineering team.
• Diagnose issues using remote monitoring systems and troubleshooting logs.
• Troubleshoot controls, instrumentation, and high-voltage electrical system issues.
• Supervise installation work at customer sites and provide the required technical support.
• Serve as the primary customer-facing technical contact during installation and support engagements.
• Complete required checklists, service reports, restart logs, and product issue logs.
• Work with the Engineering, Manufacturing, and Operations teams to communicate field issues, troubleshoot problems, and develop solutions.
• Travel to customer sites and operate a Hyliion service vehicle as needed.
• Contribute to the development of field service processes and standards as the service organization scales.
• Additional duties and responsibilities as assigned, needed, or required for the business.

Qualifications

Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

Qualifications include:

Education, Experience and Certifications

• Degree in Mechanical, Electrical, or Controls Engineering, or a related engineering discipline
• 5 years of relevant field service and troubleshooting experience required.
• Electrical experience working with high-voltage systems up to approximately 800V required.
• Experience with advanced control systems, PLCs, HMIs, instrumentation, and alarm-based troubleshooting required.
• Valid driver's license required.
• OSHA certification preferred.
• Electrical certifications, particularly electrical safety certification, preferred.
• Background in energy, power generation, or distributed generation preferred.
• Experience with energy devices using natural gas or other alternative fuels preferred.
• Prior experience supporting data center, defense, or distributed generation applications preferred.

Skills and Abilities

• Strong communication skills, including the ability to work directly with customers as the on-site technical representative.
• Ability to work independently in the field with remote engineering support.
• Ability to diagnose and resolve issues across controls, instrumentation, and electrical systems.
• Flexibility to adapt to changing schedules, site conditions, and customer needs.
• Ability to operate a service van and work at customer sites for extended assignments.
• Ability to document service work accurately and completely.

Role Classification and Working Conditions

This is a salaried, exempt-level position. This position typically works in a production/assembly/engineering lab environment and in the field at customer sites.

Physical/Other Requirements

• Ability to travel, as needed, by plane, automobile, etc., up to 70 to 80% of the time, including extended on-site assignments of several weeks to several months.
• Ability to operate a Hyliion service vehicle (van).
• Ability to lift and/or move up to 50 pounds.
• Ability to bend, kneel, crouch, reach, and work in confined or elevated positions to access equipment and components.
• Ability to use hand and power tools and to perform work requiring manual dexterity.
• Ability to work near energized electrical systems and to comply with all applicable electrical safety and lockout/tagout requirements.
• Ability to distinguish colors and read displays, gauges, labels, and schematics.
• Compliance with all Hyliion and customer or supplier site PPE and safety requirements.